Heavy duty castor, white zinc plated, top-plate mounting with a polyurethane tyred cast iron hub.

Central king-pin and self-locking nut
High resistance to abrasion, tearing, oils, petrol, greases etc
Wheels fitted with ball bearings
Temperature range -30°C to +80°C
Hardness 95+/-3 Shore A
Wheel series Z

Polyurethane tyred wheels have high tear strength and abrasion resistance which gives them a life of up to 10 times that of rubber under similar operating conditions. Polyurethane is able to carry loads approaching that of cast iron. Polyurethane has a lower tractive resistance than rubber for the same load so is better for manual handling of very heavy loads. Polyurethane is not affected by greases and mineral oils.